/* Definitions of constants and data structure for POSIX 1003.1b-1993
   scheduling interface.
   Copyright (C) 1996-2016 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#ifndef __need_schedparam

#ifndef _SCHED_H
#error "Never include <bits/sched.h> directly; use <sched.h> instead."
#endif

/* Scheduling algorithms.  */
#define SCHED_OTHER		0
#define SCHED_FIFO		1
#define SCHED_RR		2
#ifdef __USE_GNU
#define SCHED_BATCH		3
#define SCHED_IDLE		5

#define SCHED_RESET_ON_FORK	0x40000000
#endif

#ifdef __USE_GNU
/* Cloning flags.  */
#define CSIGNAL       0x000000ff	/* Signal mask to be sent at exit.  */
#define CLONE_VM      0x00000100	/* Set if VM shared between processes.  */
#define CLONE_FS      0x00000200	/* Set if fs info shared between processes.  */
#define CLONE_FILES   0x00000400	/* Set if open files shared between processes.  */
#define CLONE_SIGHAND 0x00000800	/* Set if signal handlers shared.  */
#define CLONE_PTRACE  0x00002000	/* Set if tracing continues on the child.  */
#define CLONE_VFORK   0x00004000	/* Set if the parent wants the child to
					   wake it up on mm_release.  */
#define CLONE_PARENT  0x00008000	/* Set if we want to have the same
					   parent as the cloner.  */
#define CLONE_THREAD  0x00010000	/* Set to add to same thread group.  */
#define CLONE_NEWNS   0x00020000	/* Set to create new namespace.  */
#define CLONE_SYSVSEM 0x00040000	/* Set to shared SVID SEM_UNDO semantics.  */
#define CLONE_SETTLS  0x00080000	/* Set TLS info.  */
#define CLONE_PARENT_SETTID 0x00100000	/* Store TID in userlevel buffer
					   before MM copy.  */
#define CLONE_CHILD_CLEARTID 0x00200000	/* Register exit futex and memory
					   location to clear.  */
#define CLONE_DETACHED 0x00400000	/* Create clone detached.  */
#define CLONE_UNTRACED 0x00800000	/* Set if the tracing process can't
					   force CLONE_PTRACE on this clone.  */
#define CLONE_CHILD_SETTID 0x01000000	/* Store TID in userlevel buffer in
					   the child.  */
#define CLONE_NEWCGROUP    0x02000000	/* New cgroup namespace.  */
#define CLONE_NEWUTS	0x04000000	/* New utsname group.  */
#define CLONE_NEWIPC	0x08000000	/* New ipcs.  */
#define CLONE_NEWUSER	0x10000000	/* New user namespace.  */
#define CLONE_NEWPID	0x20000000	/* New pid namespace.  */
#define CLONE_NEWNET	0x40000000	/* New network namespace.  */
#define CLONE_IO	0x80000000	/* Clone I/O context.  */
#endif

/* The official definition.  */
struct sched_param {
	int __sched_priority;
};

__BEGIN_DECLS
#ifdef __USE_GNU
/* Clone current process.  */
extern int clone(int (*__fn) (void *__arg), void *__child_stack, int __flags, void *__arg, ...) __THROW;

/* Unshare the specified resources.  */
extern int unshare(int __flags) __THROW;

/* Get index of currently used CPU.  */
extern int sched_getcpu(void) __THROW;

/* Switch process to namespace of type NSTYPE indicated by FD.  */
extern int setns(int __fd, int __nstype) __THROW;
#endif

__END_DECLS
#endif				/* need schedparam */
#if !defined __defined_schedparam \
    && (defined __need_schedparam || defined _SCHED_H)
#define __defined_schedparam	1
/* Data structure to describe a process' schedulability.  */
struct __sched_param {
	int __sched_priority;
};
#undef __need_schedparam
#endif

#if defined _SCHED_H && !defined __cpu_set_t_defined
#define __cpu_set_t_defined
/* Size definition for CPU sets.  */
#define __CPU_SETSIZE	1024
#define __NCPUBITS	(8 * sizeof (__cpu_mask))

/* Type for array elements in 'cpu_set_t'.  */
typedef __CPU_MASK_TYPE __cpu_mask;

/* Basic access functions.  */
#define __CPUELT(cpu)	((cpu) / __NCPUBITS)
#define __CPUMASK(cpu)	((__cpu_mask) 1 << ((cpu) % __NCPUBITS))

/* Data structure to describe CPU mask.  */
typedef struct {
	__cpu_mask __bits[__CPU_SETSIZE / __NCPUBITS];
} cpu_set_t;

/* Access functions for CPU masks.  */
#if __GNUC_PREREQ (2, 91)
#define __CPU_ZERO_S(setsize, cpusetp) \
  do __builtin_memset (cpusetp, '\0', setsize); while (0)
#else
#define __CPU_ZERO_S(setsize, cpusetp) \
  do {									      \
    size_t __i;								      \
    size_t __imax = (setsize) / sizeof (__cpu_mask);			      \
    __cpu_mask *__bits = (cpusetp)->__bits;				      \
    for (__i = 0; __i < __imax; ++__i)					      \
      __bits[__i] = 0;							      \
  } while (0)
#endif
#define __CPU_SET_S(cpu, setsize, cpusetp) \
  (__extension__							      \
   ({ size_t __cpu = (cpu);						      \
      __cpu / 8 < (setsize)						      \
      ? (((__cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)]		      \
	 |= __CPUMASK (__cpu))						      \
      : 0; }))
#define __CPU_CLR_S(cpu, setsize, cpusetp) \
  (__extension__							      \
   ({ size_t __cpu = (cpu);						      \
      __cpu / 8 < (setsize)						      \
      ? (((__cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)]		      \
	 &= ~__CPUMASK (__cpu))						      \
      : 0; }))
#define __CPU_ISSET_S(cpu, setsize, cpusetp) \
  (__extension__							      \
   ({ size_t __cpu = (cpu);						      \
      __cpu / 8 < (setsize)						      \
      ? ((((const __cpu_mask *) ((cpusetp)->__bits))[__CPUELT (__cpu)]	      \
	  & __CPUMASK (__cpu))) != 0					      \
      : 0; }))

#define __CPU_COUNT_S(setsize, cpusetp) \
  __sched_cpucount (setsize, cpusetp)

#if __GNUC_PREREQ (2, 91)
#define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \
  (__builtin_memcmp (cpusetp1, cpusetp2, setsize) == 0)
#else
#define __CPU_EQUAL_S(setsize, cpusetp1, cpusetp2) \
  (__extension__							      \
   ({ const __cpu_mask *__arr1 = (cpusetp1)->__bits;			      \
      const __cpu_mask *__arr2 = (cpusetp2)->__bits;			      \
      size_t __imax = (setsize) / sizeof (__cpu_mask);			      \
      size_t __i;							      \
      for (__i = 0; __i < __imax; ++__i)				      \
	if (__arr1[__i] != __arr2[__i])					      \
	  break;							      \
      __i == __imax; }))
#endif

#define __CPU_OP_S(setsize, destset, srcset1, srcset2, op) \
  (__extension__							      \
   ({ cpu_set_t *__dest = (destset);					      \
      const __cpu_mask *__arr1 = (srcset1)->__bits;			      \
      const __cpu_mask *__arr2 = (srcset2)->__bits;			      \
      size_t __imax = (setsize) / sizeof (__cpu_mask);			      \
      size_t __i;							      \
      for (__i = 0; __i < __imax; ++__i)				      \
	((__cpu_mask *) __dest->__bits)[__i] = __arr1[__i] op __arr2[__i];    \
      __dest; }))

#define __CPU_ALLOC_SIZE(count) \
  ((((count) + __NCPUBITS - 1) / __NCPUBITS) * sizeof (__cpu_mask))
#define __CPU_ALLOC(count) __sched_cpualloc (count)
#define __CPU_FREE(cpuset) __sched_cpufree (cpuset)

__BEGIN_DECLS extern int __sched_cpucount(size_t __setsize, const cpu_set_t * __setp) __THROW;
extern cpu_set_t *__sched_cpualloc(size_t __count)
__THROW __wur;
extern void __sched_cpufree(cpu_set_t * __set) __THROW;

__END_DECLS
#endif
